Can damage of the end of the abdominal wall cause pain initially? Can it make a person loose weight and effect bowel movement? Is constipation involve

Unclear. What do you. mean by "end of abdominal wall". As Soul?Mind?Brain?Body creatures, sensation of pain signals from body to brain help prevent injury/death, yet there are many more complex interacting issues & mind/brain are dominant. Thus if mind interpretation of events changes decisions then all kinds of body behaviors change in response (including changes in eating/use-of-food/weight & bowel patterns).